Packing for gas-engine valve-stems.



PATENTED AUG. 25, 1908.

1 A. K. SCHAAP. PACKING EOE GAS ENGINE VALVE STBMS.

APPLICATION FILED AUG. 8, 1907.

EH. I

'USI'LED srvrns PATENT OFFICE.

Application filed August 8, 1907.

Specification of Letters Patent.

PACKING ICE GAS-ENGINE VALVE-STEMS.

PH it knitua that I. .lutxasniln K. t 'euiu'. of the t'it of New York. horough of Brooklyn. rount of Kings, and $tate of New Y rk. have invented eertain new and u eful lmpmvelnents in Parking in! assame.

In standard four eyele gas engine construe- I tion the cylinder is tilled with the working charge either from the gas supply or from aearhureter h suetion through t 1e inlet valve oi'the working ehamher and partieularlv m fil e vas of oil engines titted with earlmi'etel's .11 eonunon defeet is the leakage f atria-tween '(r h irregularly and unsatislaetorily.

"l he llll itll \'lltf olneet of in) present inthe puppet valve stem and the guide thereof. In gasolene engines llHs deleet l. t'requently .so great that the proper earluu'rtmg of the asolene is prevented and the engine operates 'v'alve stem and its guide so tight as to interthe parts.

3 di. \'iee eneir-z'ling the valve stem and engag- I attain this end hy providing a r mg the stem guide at its inner or out r end l) \'-\\'hieh deviee a tight eonneet-iou is made between the stem and gnide and whieh deviee is assoeia-ted with means for pressing it i rmly against the stem guide during the.

- time that the 'alve is lifted from its seat. at

" whie-h time the sin-king ell'ort. is exerted j through the feed pipe line.

' deviee is located at. the outer or lu\\'t'l' end oi the stem guide and the spring which is usuj ally provided to seat the valve is made to serve the additional function of pressing the "parking device into active position at the time the inlet alve is open, by reason of the hie-t that asthe valve is opened, the sprints i'ls rmnpressed and its increased t nsion ex- .ei'ted on the pat-hing deviee.

My invention involves various other l'eatuies ulmajor or minor iniportanee all Hi .whieh will he fully set. forth iereinai'ter and f partieularlv pointed :uli. in the claims.

'lielerenee is had to the aeeompznrving' drawings. \vhir-h illustrate, as auexample. the preterm-d emlmdnuent, ol' ttlyJlH'tUiltfll, in

)VlliU-ll drawings,

Figure 1 represents a fragmeulary view of the stems and stem guides of a typieal four {eyele gasolene engine to the. inlet stem of whieh my invention is applied: Fig. 2 is an I enlarged sectional view of the packing deviee: and Pig. 3 is an enlarged sectional View of a niodiiml inrm thereof.

In Fig. I, a indieates a fragment, of the valve housing fr m which the exhaust; stem guide I) and admission stem guide b project; and e and r respeetively indicate the exhaust and admission valv stems, while (I and d res weti\'el indi-ate the springs engaging the l wer ends of the stems to seat the valves.

All f these parts ttlt.-tlot changed by my improvement exeepting that it is advisable, as lumll in Fig. 3. to slightly euunterlmre the l wer end of the stem guide as at I)".

i .\s here illu trated. the'deviee is applied to the lower or outer end of the stem guide as eontrmlislinguished from the upper or inner nd and the derieeshonn in Figs. 1 and '2 eoniprises a split lnetallie paekii g ringt having a douhle taper engaged respeetirelv by the eon-espindingly formed inner surl'aees and y of memla-rsf and 5/ eorres mnding res u-etirel v to the u ual stulling hox and gland. The stem (I passes through the parts i .f and y and pre ure tending to move the parts-f and toward eaeh other. eompresses the ring around the stem preventing all leakage at this point. The parking deriee. i as shown in Fig. 2, is engaged at its u )per end with the lower end of the stem guit e b, f while-its lower end i engaged by the spring i 1/. .\t all times the spring holds the memhersf and 5/ suntogether, but as the valve rises from its seat. the spring 1/ is compressed and its tension inereased. thus inereasing the force of the engagement of the ringe with the i stem e. In this manner the devieejs kept eomparatirely iuai-tiveexeept at the instant the valve is opt-tied. At this time. thesuetion is exerted through the earhureter, and f at this time a hermetic pat-king is necessary. The lower end of the stem guide I) may heslightly eounterlmred if desired. to reeeive I the rediiii il upper end of the gland 1; while I the stntling hoxf has the redueed luwer poi tion to he eneireled hy the upper end of the spring 11'.

' In the inodilieation of the deviee shown in f Fig.3 a sleeve I! is employed, this sleeve eneireling the stem 1 and having an enlargel meut It, at its upper end. This enlargement ame is tapered or conical to correspond with the coni al counterbore b The spring d engages the under side of the head It and crates precisely as before explained. he

sleeve 72. has a micrometer fit on the stem 0 1 seen, however, that no disadvantage would follow from the sleeve sticking slightly on the stein,sincc thiswould only serve to render '--more efl'ectual the hermetic joint between the head h and the stem guide. To secure,

5 however, a proper mechanical operation of the part'sit is necessary that the stem be free in the guide and my invention cnablcs this freedom to be carried to any necessary extent.

Having thus described the preferred forms desire to secure :5 engine valve stem and guide, of a packing of my invention, what I claim as new and by Letters Patent of the United States is:

1. The combination with a four cycle gas device encircling the stem and engaging the end of the guide to effect a hermetic connection, and means for pressing said packing dBVICB yieldingly into active positron, such means applying increased pressure during I the opening of the inlet valve.

l I l l i l g i 2. The combination with a four cycle gas engine valve stem and its guidc, of a packing device encircling the stem and engaging the outer end of thc guide and a spring connected to the stem to seat the inlet valve, the spring engaging the packing device for the purpose specified.

3. The combination with a four cycle gas engine valve stem and its guide, of a packing ring encircling the stem, packing members also cncircling the stem and inclosing the packing ring and mcans for pressing said ports against the end of the stem guide for the purpose specified. 4. Tue combination with a fcur cycle gas engine valve stem and its guide, of a packing ring encircling the stem, packing members also encircling the stem and inclosing the packing ring and means for pressin said parts against the end of the stem gu'z es for the purpose specified, such means scrvin to act with increased force during the time t rat the inlet valve is o cn.

In testimony whereof I have signed this specification in the presence 'of two subscribing witncsscs. 1

ALEXANDER K. scum.

Witnesses:

Manrox A. FREEMAN, Isaac B. Owens. 

